Скачать или смотреть Using Transformers in LTspice IV

with Gabino Alonso, Strategic Marketing
http://video.linear.com/93?utm_source...

Transformers and coupled inductors are key components in many switching regulator designs to include flyback, forward and SEPIC converters. They perform critical function in providing an isolation barrier, enabling high step-down or step-up ratios and accommodating multiple or inverting outputs. Although it is possible to make a dedicated subcircuit for a specific transformer, LTspice preferred method is to define a separate inductor for each transformer winding and then couple them all together magnetically via a single Mutual Inductance (K) statement. (http://www.linear.com/ltspice)